What did you do _________ your stay in Shanghai —Nothing much.

______ the crisis of economy getting more and more serious, the government is searching for ways to improve people’s life

–I believe that more effective measures have to be taken before we can breathe cleaner air.–______. Air pollution has become too serious a problem.

Mo Yan’s novel，Red Sorghum，was made into a film，won the Golden Bear at the Berlin Film Festival in1988．

You should try to get a good night’s sleep _______ much work you have to do.